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1036 Wisconsin Academy of Sciences , Arts, and Letters. 
Table 44 —Saponification values of commercial oleoresins. 
Sample 
No. 
Date 
Observer 
Source 
Saponifica¬ 
tion value 
\ 
1916 
DuMez. 
Squibb & Sons. 
193.4 ' 
196.9 
198.3 
2 . 
Sharp & Dohme. 
3. 
“ 
Lilly & Co. .... 
1 Contained ether. 
Iodine value: An iodine value of 122 to 123.9 was obtained 
for the oleoresins prepared in the laboratory using ether as the 
extracting menstruum. Results very near the same were ob¬ 
tained when acetone or petroleum ether were the solvents used, 
whereas, the preparation when made with alcohol gave a lower 
value, 109.3 to 105.7. The principal cause 1 for the variation 
in this constant (aside from the effect which the quality of the 
drug or the solvent may have thereon) as observed in the case 
of some of the laboratory preparations, as well as the commercial 
samples, is thought to be the difference in the degree to which 
the saturated fats (principally palmitin) have been removed. 
In the case of one of the commercial samples, however, the 
low iodine value is to be attributed to the presence of unevap¬ 
orated solvent. The results obtained in the determinations 
made in the laboratory together with those reported by Kebler 
for the total ether extract are given in the tables which follow: 
Table 45 _ Iodine values of laboratory preparations. 
Sample 
No. 
2 ... 
3.. . 
4.. . 
-24 
C'. 
1 . . 
9 
4... 
Date 
Observer 
1913 Kebler a . 
1916 DuMez 
Solvent 
Ether, 
Alcohol. 
Acetone. 
Ether...... 
Petrol. Ether 
Alcohol .. 
Acetone. 
Ether. 
Benzin. 
no 
Iodine 
value 
107. 
123.4 
125.2 
127.3 
132.0 
137.3 
138 0 
0to 14-5.7 
115.7 
125.2 
122.0 
123.7 
109.3 
118.0 
102.9 
116.9 
(a) Kebler’s results represent the iodine value of the total ether extract. 
1 Lowenstein and Dunn have shown that heating at 110° C. to remove 
volatile matter from the total ether extract causes a lowering in the iodine 
value due to absorption of oxygen by the unsaturated fats. Journ. Indust, 
and Eng. Chem. (1910). 2. p. 48. 
